Number of permutations of [n] that avoid the shuffle pattern s-k-t, where s = 123 and t = 132.
A324138
Number of permutations of [n] that avoid the shuffle pattern s-k-t, where s = 123 and t = 132.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =720a(7) =5020a(8) =39755a(9) =351518a(10) =3425572a(11) =36419844a(12) =419026188a(13) =5182797757a(14) =68535001302a(15) =964404124479
External references
- oeis: A324138